Home / 20,668.11-30,988.83-8,829.60

Finding the Fourth Proportional to 20,668.11, 30,988.83 and 8,829.60

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Solution

The fourth proportional to 20,668.11, 30,988.83 and 8,829.60 is: 13,238.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.11 : 30,988.83 = 8,829.60 : x
  2. Step 2: Convert to fraction form
    20,668.11/30,988.83 = 8,829.60/x
  3. Step 3: Cross multiply
    20,668.11x = 30,988.83 × 8,829.60
  4. Step 4: Simplify right side
    20,668.11x = 273,618,973.37
  5. Step 5: Solve for x
    x = 273,618,973.37/20,668.11
  6. Step 6: Final answer
    x = 13,238.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.